stringInSlice (slice, string): return true if string is found in slice -> used to avoid duplicates

mkdirIfNotExist creates a directory if it does not exist

sanitizePath sanitizes the path to prevent path injection.

copyPhpToKit copies the PHP file to the destination folder.

getFormPost checks if there is a POST with an action and returns the path, login attribute name, and password attribute name.

patchHtml patches html file to take local instances of css and js instead of the remote paths

patchPhp patches the PHP file with URL redirection and correct attribute names for credentials.

printBanner prints the ASCII art banner

sanitizeFilename sanitizes the filename to prevent path injection.